作业帮(X+1)(X-1)-(X-3)²
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(X+1)(X-1)-(X-3)²
(X+1)(X-1)-(X-3)²
(X+1)(X-1)-(X-3)²
原式=(x²-1)-(x²-6x+9)
=x²-1-x²+6x-9
=6x-10
解
(x+1)(x-1)-(x-3)²
=(x²-1)-(x²-6x+9)
=(x²-x²)+6x+(-1-9)
=6x-10